Here is the distribution of blood types from a group of randomly selected people:
Blood
Type:
o
А
B
AB
Probability:
0.49
0.27
0.20
0.04
Joe can safely receive blood transformations from
people with blood types O and B. What is the
probability that a randomly chosen person can
donate blood to Joe?

An observer(o) spots a plane(p) taking off from a local airport and flying at a 29 degree angle horizontal to her line of sight and located directly above a tower(t). the observer also notices a bird circling directly above her. if the distance from the plane(p) to the tower(t) is 6,000ft., how far is the bird(b) from the plane(p).